implemented header and dark theme.

src/util/util.js

@@ -0,0 +1,10 @@
+const getUserInfoFromSession = () => {
+    return {
+        "User Name": "Rajesh Kumar",
+        "PACS / Bank Name": "Demo SKUS Ltd.",
+        "User Type": "PACS Teller",
+        "Module Name": "Locker",
+    }
+}
+
+export { getUserInfoFromSession };